but doug preston says he has to know. >> why do people become obsessed?t of information that i turn up is going to strike gold. it's going to illuminate the truth. the truth is lurking somewhere in the world, all we have to do is find it. >> the monster may never be caught, but according to one famous florentine, he'll never escape either. in his poem "the inferno," renowned italian poet dante alighieri detailed the punishments he said await for each sinner in hell. the murderers, he wrote, are boiled in blood. that's all for now. i'm stone phillips. for ann curry and all of us at